diff --git a/stubs/facebook.php b/stubs/facebook.php
index 620669e..e3288b4 100644
--- a/stubs/facebook.php
+++ b/stubs/facebook.php
@@ -71,6 +71,7 @@
     |--------------------------------------------------------------------------
     |
     | Example items for your persistent Facebook menu.
+    | See https://developers.facebook.com/docs/messenger-platform/reference/messenger-profile-api/persistent-menu/#example
     |
     */
     'persistent_menu' => [